I'm upgrading to a big turbo on my 2016 ST. My goal is 350 whp. I'm also upgrading the intercooler and was looking at cpe 5.5 along with 3" downpipe and exhaust. Should I go with the 2867 versus the 2860 or would the 2867 be too much? Would also like your inputs on intercooler. I have the stage 1 cobb otf tune now. Btw it's my daily and first build.